<template>
	<view class="content">
		<view class="navbar" id="navbar" :style="{position:headerPosition,top:headerTop}">
			<view class="nav-item" :class="{current: filterIndex === 0}" @click="tabClick(0)">
				综合排序
			</view>
			<view class="nav-item" :class="{current: filterIndex === 1}" @click="tabClick(1)">
				上新优先
			</view>
			<view class="nav-item" :class="{current: filterIndex === 2}" @click="tabClick(2)">
				<text>价格</text>
				<view class="p-box">
					<text :class="{active: filterIndex === 2}" class="yticon icon-shang"></text>
					<text :class="{active: filterIndex === 2}" class="yticon icon-shang xia"></text>
				</view>
			</view>
			<text class="cate-item yticon icon-fenlei1"></text>
		</view>
		<view class="goods-list">
			<view 
				v-for="(item, index) in goodsList" :key="index"
				class="goods-item"
				@click="navToDetailPage(item)"
			>
				<view class="image-wrapper">
					<image :src="item.mainImage" mode="aspectFill"></image>
				</view>
				<text class="title clamp">{{item.name}}</text>
				<view class="price-box">
					<text class="price">{{item.price}}</text>
					<text>库存： {{item.stock}}</text>
				</view>
			</view>
		</view>
		<uni-load-more :status="loadingType"></uni-load-more>
	</view>
</template>

<script>
	import {apiGetProductListInMain} from '@/api/product.js'
	export default {
		data() {
			return {
				headerPosition:"fixed",
				headerTop:"0px",
				loadingType: 'loadmore', //加载更多状态
				filterIndex: 0, 
				queryParams:{
					searchValue:'',
					pageNum:1,
					pageSize:10,
					params:{},
					
				},
				goodsList: [],
			}
		},
		
		onLoad(options){
			this.queryParams.searchValue = options.searchValue
			// #ifdef H5
			this.headerTop = 40+'px';
			// #endif
			// #ifndef APP-PLUS
			uni.getSystemInfo({
				success:function(res){
					this.headerTop = res.statusBarHeight
				}
			})
			// #endif
			this.doGetProdData('init')
		},
		onPageScroll(e){
			//兼容iOS端下拉时顶部漂移
			if(e.scrollTop>=0){
				this.headerPosition = "fixed";
			}else{
				this.headerPosition = "absolute";
			}
		},
		//下拉刷新
		onPullDownRefresh(){
			this.doGetProdData('refresh');
		},
		//加载更多
		onReachBottom(){
			this.doGetProdData('more');
		},
		methods: {
			refreshData(){
				this.queryParams.pageNum = 1
				this.queryParams.pageSize = 10
				this.queryParams.price = 0
				// this.queryParams.searchValue = ''
				this.loadingType = 'loadmore'
				this.goodsList = []
			},
			//加载商品 ，带下拉刷新和上滑加载
			async doGetProdData(val) {	
				if(this.loadingType === 'nomore'){
					return
				}
				let params = JSON.parse(JSON.stringify(this.queryParams))
				apiGetProductListInMain(params).then(res=>{
					console.log(res)
					if('init' === val){
						this.goodsList = res.rows
					}else if('more' === val){
						this.goodsList = [...this.goodsList,...res.rows]
					}else if('refresh' === val){
						this.goodsList = res.rows
					}
					this.queryParams.pageNum += 1
					if(res.rows.length < this.queryParams.pageSize){
						this.loadingType = 'nomore'
					}
				})
			},
			//筛选点击
			tabClick(index){
				this.refreshData()
				if(this.filterIndex === index){
					return 
				}
				this.filterIndex = index
				if(index === 0){
					this.queryParams.params = null
				}else if(index === 1){
					this.queryParams.params.update_time=true
				}else if(index === 2){
					this.queryParams.params.price=true
				}
				uni.pageScrollTo({
					duration: 300,
					scrollTop: 0
				})
				this.doGetProdData('refresh');
			},
			//详情
			navToDetailPage(item){
				//测试数据没有写id，用title代替
				let id = item.id;
				uni.navigateTo({
					url: `/pages/product/product?product_id=${id}`
				})
			},
			stopPrevent(){}
		},
	}
</script>

<style lang="scss">
	page, .content{
		background: #f8f8f8;
	}
	.content{
		padding-top: 96upx;
	}

	.navbar{
		position: fixed;
		left: 0;
		// top: var(--window-top);
		display: flex;
		width: 100%;
		height: 80upx;
		background: #fff;
		box-shadow: 0 2upx 10upx rgba(0,0,0,.06);
		z-index: 10;
		.nav-item{
			flex: 1;
			display: flex;
			justify-content: center;
			align-items: center;
			height: 100%;
			font-size: 30upx;
			color: #303133;
			position: relative;
			&.current{
				color: #fa436a;
				&:after{
					content: '';
					position: absolute;
					left: 50%;
					bottom: 0;
					transform: translateX(-50%);
					width: 120upx;
					height: 0;
					border-bottom: 4upx solid #fa436a;
				}
			}
		}
		.p-box{
			display: flex;
			flex-direction: column;
			.yticon{
				display: flex;
				align-items: center;
				justify-content: center;
				width: 30upx;
				height: 14upx;
				line-height: 1;
				margin-left: 4upx;
				font-size: 26upx;
				color: #888;
				&.active{
					color: #fa436a;
				}
			}
			.xia{
				transform: scaleY(-1);
			}
		}
		.cate-item{
			display: flex;
			justify-content: center;
			align-items: center;
			height: 100%;
			width: 80upx;
			position: relative;
			font-size: 44upx;
			&:after{
				content: '';
				position: absolute;
				left: 0;
				top: 50%;
				transform: translateY(-50%);
				border-left: 1px solid #ddd;
				width: 0;
				height: 36upx;
			}
		}
	}

	/* 分类 */
	.cate-mask{
		position: fixed;
		left: 0;
		top: var(--window-top);
		bottom: 0;
		width: 100%;
		background: rgba(0,0,0,0);
		z-index: 95;
		transition: .3s;
		
		.cate-content{
			width: 630upx;
			height: 100%;
			background: #fff;
			float:right;
			transform: translateX(100%);
			transition: .3s;
		}
		&.none{
			display: none;
		}
		&.show{
			background: rgba(0,0,0,.4);
			
			.cate-content{
				transform: translateX(0);
			}
		}
	}
	.cate-list{
		display: flex;
		flex-direction: column;
		height: 100%;
		.cate-item{
			display: flex;
			align-items: center;
			height: 90upx;
			padding-left: 30upx;
 			font-size: 28upx;
			color: #555;
			position: relative;
		}
		.two{
			height: 64upx;
			color: #303133;
			font-size: 30upx;
			background: #f8f8f8;
		}
		.active{
			color: #fa436a;
		}
	}

	/* 商品列表 */
	.goods-list{
		display:flex;
		flex-wrap:wrap;
		padding: 0 30upx;
		background: #fff;
		.goods-item{
			display:flex;
			flex-direction: column;
			width: 48%;
			padding-bottom: 40upx;
			&:nth-child(2n+1){
				margin-right: 4%;
			}
		}
		.image-wrapper{
			width: 100%;
			height: 330upx;
			border-radius: 3px;
			overflow: hidden;
			image{
				width: 100%;
				height: 100%;
				opacity: 1;
			}
		}
		.title{
			font-size: 32upx;
			color: #303133;
			line-height: 80upx;
		}
		.price-box{
			display: flex;
			align-items: center;
			justify-content: space-between;
			padding-right: 10upx;
			font-size: 24upx;
			color: #909399;
		}
		.price{
			font-size: 32upx;
			color: #fa436a;
			line-height: 1;
			&:before{
				content: '￥';
				font-size: 26upx;
			}
		}
	}
	

</style>
